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Übung 3.2-3.3/Schmitt-Linnea.sql

+--Die Reihenfolge ist nicht mehr in der Reihenfolge in der ich sie bearbeitet habe, da ursprnglich nicht alles in einer Datei hatte.
+-- Tabelle employees erstellen
+create table employees (
+employee_id smallint not null,
+last_name character varying(20) not null,
+first_name character varying(30) not null,
+title character varying(30),
+title_of_courtesy character varying(25),
+birth_date date,
+hire_date date,
+address character varying(60),
+city character varying(15),
+region character varying(15),
+postal_code character varying(10),
+country character varying(15),
+home_phone character varying(24),
+extension character varying(4),
+photo bytea,
+notes text,
+reports_to smallint,
+photo_path character varying(255)
+);
+
+--Tabell regions erstellen
+create table regions(
+region_id integer,
+region_headquarter_city character varying(40) not null
+);
+
+--Tabelle employees_regions erstellen
+create table employees_regions(
+employee_id smallint,
+region_id integer
+);
+
+--Werte in Tabelle regions einfgen
+insert into regions (region_id, region_headquarter_city) values
+(1,'Mainz'),
+(2,'Madrid'),
+(3,'Miami'),
+(4,'Rio de Janeiro');
+
+--Primrschlssel erstellen
+alter table employees
+add constraint pk_employees primary key (employee_id);
+
+alter table employees_regions
+add constraint pk_employee_regions primary key (employee_id, region_id);
+
+--Fremdschlssel erstellen
+alter table employees
+add foreign key (reports_to) references employees(employee_id);
+
+alter table orders
+add foreign key (employee_id) references employees(employee_id);
+
+alter table employees_regions
+add foreign key (employee_id) references employees(employee_id);
+
+alter table employees_regions
+add foreign key (region_id) references regions(region_id);
+
+--Spalte Handynummer zur Tabelle employees hinzufgen
+alter table only employees
+add column MobilePhoneNumber character varying(25);
+
+-- Spalte Handynummer ausfllen
+update employees set mobilephonenumber = 52835397253836;
+
+--Index erstellen
+create index idx_employees_last_name on employees(last_name);
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